/Engine/Source/Editor/UnrealEd/Public/Kismet2/BlueprintEditorUtils.h
Event fired after RenameVariableReferences is called
typedef TMulticastDelegate_FourParams< void, [UBlueprint](API\Runtime\Engine\Engine\UBlueprint) *, [UClass](API\Runtime\CoreUObject\UObject\UClass) *, const [FName](API\Runtime\Core\UObject\FName) &, const [FName](API\Runtime\Core\UObject\FName) & > FOnRenameVariableReferences